JP2014107624A - Monitoring control apparatus, monitoring control method and monitoring control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately perform a communication path switching operation by evaluating influences in the case where an event occurs, from a notification of a previous notice about the occurrence of the event to the occurrence of the event.SOLUTION: In a monitoring control apparatus 321, prediction information is received by a receiving section 501, and a predictive influence extent of an event is set by a setting section 502 regarding a transfer device within a predictive occurrence area included in the prediction information. On the basis of the predictive influence extent of the event, a first acquisition section 503 acquires a predictive influence extent regarding a communication path with the transfer device within the predictive occurrence area as a relay point and on the basis of the predictive influence extent regarding the communication path, an identification section 504 identifies a switching destination communication path candidate group. On the basis of the predictive influence extent of the event, a second acquisition section 505 acquires a predictive influence extent regarding a switching destination communication path candidate and on the basis of the predictive influence extent regarding the communication path and the predictive influence extent regarding the switching destination communication path candidate, a determination section 507 determines a switching destination communication path. A control section 508 then controls switching from the communication path to the switching destination communication path.

Description

  The present invention relates to a monitoring control device, a monitoring control method, and a monitoring control program.

  As background arts in this technical field, there are JP 2010-245702 (Patent Document 1), JP 2008-166742 (Patent Document 2), and JP 2009-065411 (Patent Document 3).

  In Patent Document 1, in the first communication device, behavior information is stored in association with a storage unit in advance. The behavior information is information indicating a disaster scenario for specifying a disaster situation and behavior that the second communication device should perform in data transmission when a disaster occurs. In addition, the emergency bulletin receiving unit receives an emergency bulletin for notifying a disaster from an external notification means, and the extraction unit identifies a disaster scenario based on the emergency bulletin and is associated with the identified disaster scenario. The behavior information is extracted from the storage unit. Then, the transmission unit transmits the extracted behavior information to the second communication device. In the second communication device, the behavior information receiving unit receives the behavior information from the first communication device, and the data transmission control unit controls data transmission of the second communication device based on the behavior information. As described above, the technique of Patent Document 1 suppresses the influence of a disaster by using emergency bulletin.

  Further, in Patent Document 2, the node device registers or deletes a fixed path and a dynamic path separately. A fixed path is a path that remains in the management table even when the path status changes. A dynamic path is a path that is temporarily registered in the management table only when a path is generated, and is deleted from the management table in response to a change in path status. The node device grasps the registration status of the fixed path and the dynamic path, and generates or deletes the fixed path or the dynamic path according to a predetermined switching state transition algorithm based on the information on the failure on the network and the registration status.

  Further, the node device registers or deletes the management table according to the generation or deletion. As a result, the node device of Patent Document 2 reduces the number of management target paths while ensuring the reliability with respect to a single failure with respect to the simultaneous failure of the working path and the backup path, and reduces the management load on the node device.

  Further, in Patent Document 3, the communication device collects and holds link information including information indicating an available bandwidth for each priority for each link in the system, and sets the bandwidth and priority of the set path and the link information. Based on this, the route of the set path is determined. Next, the communication device includes a link to be changed that contains a path that needs to be deleted or changed in bandwidth by setting a set path among the determined links, and an individual link priority that is a priority of the path. Is identified. And a communication apparatus acquires path information from the apparatus which manages the path information of the communication apparatus connected to the change object link, or a communication system.

  The path information includes path identification information, bandwidth, priority, and information for identifying the communication device that is the starting point of the path for a path that is less than or equal to the individual link priority of the change target link accommodated in the change target link. Information. That is, the communication device of Patent Document 3 collects information on a candidate path when it is necessary to change or delete a path with a lower priority in accordance with a new path setting.

JP 2010-245702 A JP 2008-166942 A JP 2009-065411 A

  Since the emergency bulletin is a forecast bulletin and a notification for prompting attention, the actual occurrence probability of an event predicted for frequent notification may be very low and may not be damaged at all. However, when an event actually occurs, a failure occurs over a wide area.

  When Patent Document 1 is applied to communication path switching control, the technique of Patent Document 1 switches the communication path without evaluating the communication interruption time based on the preliminary report having a very low event occurrence probability. Therefore, there is a possibility of deviating from Service Level Agreements (SLAs) such as a user allowable communication cut-off time despite no damage.

  When Patent Document 2 is applied to redundant path setting, even the third communication path determined in advance corresponds to the disaster area, the node device of Patent Document 2 cannot escape the communication path, and communication is interrupted. There is a problem that occurs.

  The communication device of Patent Document 3 controls the setting deletion based on the priority in the resource allocation set in advance in the channel setting. However, since the SLA at the time of switching is not taken into consideration, the communication device deviates from the SLA at the time of system switching. There is a possibility that.

  An object of the present invention is to appropriately perform a switching operation of a communication path by evaluating an influence when an event occurs between notification of occurrence occurrence prediction and occurrence of the event.

  A monitoring control device, a monitoring control method, and a monitoring control program, which are one aspect of the invention disclosed in the present application, are among transfer devices that receive prediction information including an expected influence degree of an event and an expected occurrence area, and perform data transfer. For the transfer device in the prediction occurrence area included in the prediction information, the expected influence degree of the event is set in the storage device, and the transfer device in the prediction occurrence region in the transfer device group is set as a relay point. The expected impact level related to the communication path is acquired based on the expected impact level of the event, and based on the acquired expected impact level regarding the communication path, the transfer apparatuses at both ends of the transfer apparatus group A switching destination channel candidate group that is a communication path in common with the path is specified, and the expected influence degree regarding each switching destination channel candidate of the specified switching destination channel candidate group is expressed as an expected effect of the event. And determining a switching destination communication path from the switching destination communication path candidate group based on the expected influence degree regarding the communication path and the expected influence degree regarding each of the switching destination communication path candidates. The switching from the communication path to the switching destination communication path is controlled.

  According to one aspect of the present invention, a communication path switching operation can be appropriately performed. Problems, configurations, and effects other than those described above will become apparent from the description of the following embodiments.

It is explanatory drawing which shows the example (the 1) of communication path switching concerning a present Example. It is explanatory drawing which shows the example (the 2) of communication path switching concerning a present Example. It is explanatory drawing which shows the system configuration example of the network system concerning a present Example. It is a block diagram which shows the hardware structural example of a computer. It is a block diagram which shows the functional structural example of a monitoring control apparatus. It is explanatory drawing which shows the example of a data structure of an emergency early warning message. It is explanatory drawing which shows an example of the memory content of a transfer apparatus table. It is explanatory drawing which shows an example of the memory content of a communication path structure information table. It is explanatory drawing which shows an example of the memory content of a connection information table. It is explanatory drawing which shows an example of the memory content of a switching destination channel candidate structure information table. It is explanatory drawing which shows an example of the memory content of the switching regulation table classified by priority. It is explanatory drawing which shows the data structure example of a switching request message. It is explanatory drawing which shows an example of the memory content of the communication-path structure information table after switching operation completion. It is a flowchart which shows the example of a monitoring control processing procedure which a monitoring control apparatus performs. It is a flowchart which shows the detailed process sequence example of the prediction influence degree determination process regarding the communication path shown in FIG. It is a flowchart which shows the detailed process sequence example of the switching / switching-back rule extraction process shown in FIG. It is a flowchart which shows the detailed process sequence example of the switching destination determination process shown in FIG. It is a sequence diagram which shows the example of a switching control sequence of the communication path in a network system. It is a flowchart which shows the example of a communication path switch-back process.

<Example of channel switching>
FIG. 1 is an explanatory diagram illustrating a communication path switching example (part 1) according to the present embodiment, and FIG. 2 is an explanatory diagram illustrating a communication path switching example (part 2) according to the present embodiment. FIG. 1 shows a state before switching the communication path, and FIG. 2 shows a state after switching the communication path.

  1 and 2, there are transfer devices in a network such as the Internet, a LAN (Local Area Network), and a WAN (Wide Area Network). Here, as an example, a plurality of transfer apparatuses 101 to 108 are arranged. The connection between the transfer devices is represented by a line connecting the transfer devices in FIGS. 1 and 2. The transfer apparatuses 101 to 108 are set with “001” to “008” as unique IDs. Note that a client terminal (not shown) may be connected to the transfer devices 101 to 108, for example.

  In FIG. 1, the communication path P <b> 1 is a path that passes through the transfer device 103 with the transfer devices 101 and 102 as endpoints. The communication path P <b> 2 is a path that has the transfer apparatuses 101 and 102 as endpoints and passes through the transfer apparatus 104. Here, as an example, the communication path P1 is a working path, and the communication path P2 is a protection path.

  The event occurrence region R is a region where an event is expected to occur. Here, the event includes a threat factor that requires switching of the communication path in the network. Threat factors include, for example, power outages, weather, disasters, and social phenomena. Examples of power outages include planned power outages, fault power outages, and power outages. Examples of weather include storms, floods, and high temperatures. Examples of disasters include earthquakes and tsunamis. Examples of social phenomena include strikes, riots, and wars.

  In this embodiment, such a threat occurrence prediction is reported in advance. For example, taking a disaster as an example, there is an emergency bulletin for notifying disaster information before the disaster occurs. The emergency bulletin is a forecast bulletin and a notice for prompting attention. Therefore, although the actual occurrence probability of an event predicted for frequent notification is very low and may not be damaged at all, a failure occurs in a wide range when an event actually occurs. An example of emergency warning is emergency earthquake warning. The emergency earthquake bulletin is a bulletin that is notified via the network of the predicted arrival time and seismic intensity at each location as the earthquake motion prediction or warning.

  When the emergency bulletin is received, the monitoring and control apparatus according to the present embodiment causes the transfer device serving as a route point of the communication path to evacuate the communication path included in the predicted occurrence area R. In the example of FIG. 1, the transfer apparatuses 103 and 104 are included in the expected occurrence area R. Therefore, the communication paths P1 and P2 become switching target paths.

  When switching the communication paths P1 and P2, the supervisory control device compares the expected impact of the event on the switching source communication paths P1 and P2 with the expected impact of the event on the switching destination communication path, Evaluate the adequacy of switching. In addition to the expected impact level, the monitoring control apparatus evaluates the SLA at the time of switching the communication path. When switching is appropriate based on the evaluation result, the monitoring control device switches to the switching destination communication path.

  FIG. 2 shows communication paths P3 and P4 after switching. The communication path P1 in FIG. 1 is switched to the communication path P3, and the communication path P2 in FIG. 1 is switched to the communication path P4. The communication path P3 is a path that passes through the data communication apparatus 105 with the transfer apparatuses 101 and 102 as endpoints. The communication path P4 is a path that passes through the data communication apparatus 105 with the transfer apparatuses 101 and 102 as endpoints. In the example of FIGS. 1 and 2, the example in which the communication paths P1 and P2 are switched has been described. However, when only the transfer device 103 exists in the expected occurrence region R among the transfer devices 103 and 104, the supervisory control is performed. The apparatus switches the standby communication path P2 to the active system and switches from the communication path P1 to the communication path P3. When only the transfer device 104 is present in the expected occurrence region R among the transfer devices 103 and 104, the monitoring control device switches the communication path P2 that is the standby system to the communication path P4.

  As described above, in this embodiment, even when an indeterminate or fixed failure is expected to occur in the communication channel, the switching operation is appropriately realized after evaluating the expected impact of the event and the SLA regarding the switching operation. can do.

<System configuration example>
FIG. 3 is an explanatory diagram of a system configuration example of the network system according to the present embodiment. The network system 300 includes a notification system 301, a monitoring control system 302, and a transfer device 303. The notification system 301 is a system for notifying the monitoring and control system 302 of an emergency bulletin such as an emergency earthquake bulletin via the network 310.

  The monitoring control system 302 includes a monitoring control device 321 and a switching control device 322. The monitoring control device 321 is connected to the notification system 301 via a network. The monitoring control device 321 receives the emergency bulletin from the notification system 301. In addition, the monitoring control device 321 is connected to the switching control device 322. The monitoring control device 321 performs the above-described communication path switching evaluation, and instructs the switching control device 322 to switch the communication path. In addition, the monitoring control device 321 instructs the switching control device 322 to switch the switching destination communication path back to the original communication path.

  The switching control device 322 is connected to the transfer device 303 in charge. The switching control device 322 switches the communication path to be switched to the communication path designated as the switching destination in accordance with an instruction from the monitoring control apparatus 321. Further, the switching control device 322 switches the switching destination communication path back to the original communication path in response to an instruction from the monitoring control device 321.

  The transfer device 303 is a device that transfers data, and examples thereof include a router, a switch, and a bridge. The transfer device 303 is the transfer devices 101 to 108 shown in FIG. The transfer device 303 constitutes a network, but is illustrated outside the network for convenience in FIG.

<Hardware configuration example>
FIG. 4 is a block diagram illustrating a hardware configuration example of a computer. The computer here is, for example, the monitoring control device 321 or the switching control device 322 shown in FIG. The computer is a general information device such as a server, such as a CPU (Central Processing Unit) 401, a NIC (Network Interface Card) 402, an input unit 403, an output unit 404, a memory 405, an HDD (Hard Disk Drive) 406, and A transmission path 407 such as a bus for connecting them is provided.

  The CPU 401 controls the entire computer. The NIC 402 is connected to a network such as a LAN, WAN, or the Internet through a communication line, and is connected to another device via the network. The NIC 402 controls an internal interface with the network, and controls input / output of data from an external device. The input unit 403 inputs data. As the input unit 403, for example, an input key or a touch panel is employed. The output unit 404 outputs data. As the output unit 404, a display or a speaker is employed. The memory 405 and the HDD 406 store various data and programs. The memory 405 is used as a work area for the CPU 401.

<Functional Configuration Example of Monitoring and Control Device 321>
FIG. 5 is a block diagram illustrating a functional configuration example of the monitoring control device 321. The monitoring control device 321 includes a reception unit 501, a setting unit 502, a first acquisition unit 503, a specification unit 504, a second acquisition unit 505, a determination unit 507, and a second acquisition unit 505. Acquisition unit 506, control unit 508, and third acquisition unit 506. Specifically, the receiving unit 501 to the control unit 508 realize their functions, for example, by causing the CPU 401 to execute a program stored in the memory 405 or the HDD 406 illustrated in FIG. 4 or by using the NIC 402.

  The accepting unit 501 accepts forecast information including the expected impact level of an event and a forecast occurrence area. Specifically, for example, the accepting unit 501 accepts an emergency early warning message transmitted from the notification system 301 via the network 310 as prediction information. The received emergency early warning message is written in the memory 405 or the HDD 406.

  FIG. 6 is an explanatory diagram showing an example of the data structure of the emergency early warning message. The emergency bulletin message 600 includes an event type item 601, an event range item 602, an expected impact item 603, a start time item 604, and an end time item 605. In the event type item 601, the event type is written. The event type is information that classifies the cause of the event, and includes, for example, the power outage, weather, disaster, and social phenomenon described above. In FIG. 6, as an example, “earthquake” as a disaster is written.

  An event range is written in the event range item 602. The event range is a range where an event is expected to occur. For example, latitude and longitude information, an address, a region name, etc. are written. In FIG. 6, since the event type is “earthquake”, “Northern Tokyo”, which is the affected area, is written as an example of the event range.

  In the expected impact level item 603, the expected impact level is written. The expected impact level is information indicating the degree of damage expected when an event occurs. In FIG. 6, since the event type is “earthquake”, the predicted seismic intensity of the main motion is written as an example of the predicted impact level.

  In the start time item 604, the start time is written. The start time is an expected start time when an event occurs. In FIG. 6, since the event type is “earthquake”, the expected arrival time of the main motion is written as the start time as an example of the start time.

  In the end time item 605, the end time is written. The end time is an expected end time at which the generated event ends. In FIG. 6, since the event type is “earthquake”, the end time of the main motion is written as an example of the end time. When the end time is unknown, the end time may not be recorded.

  Returning to FIG. 5, the setting unit 502 stores the expected impact level of the event for the transfer device 303 in the prediction occurrence area included in the prediction information received by the receiving unit 501 in the transfer device group that performs data transfer. Set to device. Specifically, for example, the setting unit 502 associates the transfer device 303 in the predicted occurrence area with the predicted impact level of the event and stores them in the memory 405 or the HDD 406. For example, in the case of the emergency bulletin message 600 in FIG. 6, the setting unit 502 associates the transfer device 303 existing in the event range “Northern Tokyo” with the predicted seismic intensity in the transfer device table in FIG. 7.

  FIG. 7 is an explanatory diagram of an example of the contents stored in the transfer device table. The transfer device table 700 is stored in the memory 405 or the HDD 406 and has information indicating the state of the transfer device 303. Specifically, the transfer device table 700 includes a node ID item 701, an installation location item 702, an event tolerance item 703, and an expected information item 704. The node ID item 701 stores a node ID. The node ID is identification information unique to the transfer device 303. The installation location item 702 stores an installation location. The installation location is information indicating a location where the transfer device 303 specified by the node ID is installed. The transfer device 303 with the node ID: 003 is the transfer device 103 in FIG. 1, and the transfer device 303 with the node ID: 004 is the transfer device 104 in FIG.

  The event resistance item 703 stores information indicating the event resistance. Here, as an example, three types of tolerance items are set: a tsunami response capability item 731, a power supply possible time item 732 when power transmission is stopped, and a switching time item 733. The tsunami response capability item 731 stores the tsunami response capability when the event is a tsunami. The tsunami response power is information obtained by quantifying the response to the tsunami at the installation location of the transfer device 303 specified by the node ID. Examples of tsunami response capabilities include sea level.

  The power feedable time item 732 at the time of power transmission stop stores the power feedable time at the time of power transmission stop when the event is a power failure. The power supply possible time when power transmission is stopped is the power supply possible time during which power can be supplied when power transmission is stopped.

  The switching time item 733 stores the switching time when the event is an earthquake. The switching time is the time required for switching the communication path. Examples of the switching time include no instantaneous interruption (switching time 0 seconds) and instantaneous interruption (switching time 0.5 seconds).

  In the prediction information item 704, information included in the prediction information is written. Specifically, the predicted information item 704 is classified into a predicted impact level item 741, an event type item 742, a start time item 743, and an end time item 744. The contents of the predicted impact item 741, the event type item 742, the start time item 743, and the end time item 744 are the same as the data structure of the predicted information shown in FIG.

  The setting unit 502 compares the event range of the prediction information received by the reception unit 501 with the installation location of the transfer device table 700, identifies the same installation location, and sets the prediction information item 704 of the corresponding record in the prediction information item 704. Write the impact, event type, start time, and end time. For example, in the case of the prediction information shown in FIG. 6, the setting unit 502 writes the prediction information as shown in FIG. As a result, it is possible to know what expected influence level, event type, start time, and end time are associated with the transfer device 303 at which installation location.

  Returning to FIG. 5, the first acquisition unit 503 converts the expected influence degree regarding the communication path that uses the transfer device 303 in the expected occurrence area in the transfer device group as a relay point to the expected influence degree of the event set by the setting unit 502. Get based on. The expected impact level of an event is the expected impact level set in each transfer device 303 as shown in FIG. For example, in the transfer device 303 table of FIG. 7, when the record of the transfer device 103 with the node ID: 003 is referred to, the expected influence degree of the transfer device 103 is “6”.

  Moreover, the expected influence degree regarding a communication path is the expected influence degree which aggregated the expected influence degree of the event about each transfer apparatus 303 used as a relay point among the transfer apparatus groups which comprise a communication path. For example, among the expected influence levels of events for the transfer device group serving as a relay point, the maximum value may be the expected influence level for the communication path, and the average value or the median value may be the expected influence level for the communication path.

  More specifically, for example, in the case of the communication path P <b> 3 in FIG. 1, the transfer device 303 serving as a relay point is only the transfer device 103. Therefore, the expected influence degree of the event regarding the transfer apparatus 103 becomes the expected influence degree regarding the communication path P3 as it is. Moreover, the 1st acquisition part 503 produces the communication path structure information table shown in FIG. 8 by acquiring the estimated influence degree regarding a communication path.

  FIG. 8 is an explanatory diagram of an example of the contents stored in the communication path configuration information table. The communication path configuration information table 800 is stored in the memory 405 or the HDD 406 and has information indicating the state of the communication path. Specifically, the channel configuration information table 800 includes a channel ID item 801, a channel classification item 802, a first endpoint item 803, a second endpoint item 804, a transit device item 805, and a channel type. It includes an item 806, an operation state item 807, a prediction information item 808, a switching time item 809, and an SLA class item 810.

  The communication path ID item 801 stores the communication path ID. The communication channel ID is identification information unique to the communication channel. The communication path classification item 802 stores a communication path classification. The communication channel classification is information for distinguishing whether the communication channel is an active system or a standby system. The first endpoint item 803 stores the node ID of the transfer device 303 at one endpoint (hereinafter, “first endpoint”) of the communication path. The second endpoint item 804 stores the node ID of the transfer device 303 at the other endpoint of the communication path (hereinafter “second endpoint”).

  The transit device item 805 stores information related to transit devices. The transit device is a transfer device 303 serving as a relay point of the communication path. In the case of the communication path P3 in FIG. 1, the transfer device 103 is a transit device. The via device item 805 is divided into a node ID item 851 and an expected influence level item 852. The node ID item 851 stores a node ID. The node ID is identification information unique to the transfer device 303. In the expected impact level item 852, the expected impact level of the event for the transfer device 303 with the node ID is written by the first acquisition unit 503.

  The communication path type item 806 stores the communication path type. The communication path type is information indicating whether the communication path is originally a communication path or a communication path switched by an event. For example, “basic” indicates the original communication path, and “temporary” indicates the communication path switched by the event. The operation status item 807 stores the operation status. The operation state is information indicating whether or not the communication path is in operation. For example, when it is in operation, “operation” is set.

  In the prediction information item 808, prediction information of the communication path is written. Specifically, the prediction information item 808 is subdivided into an event type item 881, a predicted influence level item 882 regarding a communication path, a start time item 883, and an end time item 884. The contents of the event type item 881, the start time item 883, and the end time item 884 are the same as those in the transfer device table 700 of FIG. In the expected influence degree item 882 regarding the communication path, the expected influence degree regarding the communication path is stored by the first acquisition unit 503.

  In the switching time item 809, the switching time is written. The switching time is the time when the communication path is switched to the switching destination communication path. The SLA class item 810 stores the SLA class. The SLA class is information indicating the SLA level in the communication path. Here, for example, the switching priority of the communication path is stored. The switching priority is an index that is compared with other communication paths during the switching operation of the communication path. In addition, as the SLA level, for example, power supply priority or repair work priority may be adopted.

  Returning to FIG. 5, the identifying unit 504 uses the expected influence degree related to the communication path acquired by the first acquisition unit 503, so that the transfer apparatus 303 serving as the end point is the communication path shared by the communication path among the transfer apparatus groups. The switching destination channel candidate group that is is specified. Specifically, for example, the identifying unit 504 refers to the communication path configuration information table 800 and identifies a communication path having an expected influence degree related to the communication path that is equal to or greater than a predetermined value. Next, the specifying unit 504 specifies the transfer device 303 at the first end point and the transfer device 303 at the second end point in the specified communication path.

  Then, the specifying unit 504 specifies a switching destination communication path candidate that connects the first end point and the second end point with reference to the connection information table illustrated in FIG. 9. In this case, the specifying unit 504 specifies a switching destination channel candidate group that is a communication channel whose expected influence degree of an event is lower than the expected influence degree regarding the communication path. For example, since the expected influence degree regarding the communication path P3 is “6”, the switching destination communication path candidate is specified so that the transfer apparatus 303 whose expected influence degree of the event is “5” or less becomes the transit apparatus. Become. As a result, the switching destination communication path candidate is a path that is less likely to suffer from an event than the switching source communication path.

  FIG. 9 is an explanatory diagram of an example of the contents stored in the connection information table. The connection information table 900 is stored in the memory 405 or the HDD 406 and has information indicating the connection relationship between the transfer apparatuses 303. Specifically, the connection information table 900 includes an A side port item and a B side port item. The A side port item and the B side port item are subdivided into a node ID item 701 and a port number item. The node ID item 701 stores a node ID. A port number is stored in the port number item. For example, taking the record in the first line as an example, the port of port number: 03 of the transfer apparatus 101 with node ID: 001 and the port of port number: 01 of the transfer apparatus 103 with node ID: 003 are connected. Indicates that

  FIG. 10 is an explanatory diagram of an example of the storage contents of the switching destination channel candidate configuration information table. The switching destination channel candidate configuration information table 1000 is stored in the memory 405 or the HDD 406 and has information indicating the status of the switching destination channel candidate specified by the specifying unit 504. Specifically, the switching destination channel candidate configuration information table 1000 includes a channel ID item 1001, a candidate ranking item 1002, a channel category item 1003, a first endpoint item 1004, a second endpoint item 1005, It has a via device item 1006, an expected impact level item 1007 related to a communication path, and an event tolerance item 1008. For the communication channel ID item 1001, the communication channel classification item 1003, the first endpoint item 1004, the second endpoint item 1005, the transit device item 1006, and the expected influence item 1006 regarding the communication channel, the communication channel configuration information table 800 of FIG. Since the contents are the same as those in FIG.

  Candidate rank is written in the candidate rank item 1002. The candidate rank is a rank sorted according to the expected influence degree and the resistance to the event regarding the communication path. It may be set in advance which of the expected influence degree and the resistance to the event regarding the communication path should be prioritized. In the present embodiment, the highest priority is given to the expected influence level relating to the communication path, and when the expected influence degree relating to the communication path is the same, the candidate ranking is given by the resistance to the event. Information indicating the resistance to the event is written into the event resistance item 1008 by the third acquisition unit 506 described later. Here, the switching time is written as resistance to the event.

  Note that the specifying unit 504 may not perform the above-described specifying process when the expected influence level regarding the communication path acquired by the first acquiring unit 503 is equal to or less than a predetermined threshold value. For example, when the threshold value is “3”, when the predicted seismic intensity is “3” or less, there is no need to switch the communication channel, and therefore the switching destination channel candidate may not be specified. Thereby, useless switching of the communication path can be suppressed.

  Returning to FIG. 5, the second acquisition unit 505 acquires the expected impact level regarding each switching destination channel candidate of the switching destination channel candidate group specified by the specifying unit 504 based on the expected impact level of the event. . Specifically, for example, since the switching destination channel candidate group is specified by the specifying unit 504, the second acquisition unit 505 determines the expected influence degree regarding the communication path for each switching destination channel candidate using the first acquisition unit. Acquired in the same manner as 503. In other words, the second acquisition unit 505 may set the maximum value of the expected influence degree of the event regarding the transfer device group serving as the relay point in the switching destination communication path candidate as the expected influence degree regarding the communication path, and the average value. Or the median value may be used as the expected influence level for the communication channel.

  The third acquisition unit 506 indicates the resistance to the event related to the switching destination channel candidate based on the value indicating the resistance to the event regarding the transfer device group constituting the switching destination channel candidate stored in the storage device. Get the value. Specifically, for example, the third acquisition unit 506 acquires the switching time as a value indicating resistance to the event for each switching destination channel candidate. As for the switching time, for example, the third acquisition unit 506 refers to the transfer device table 700 shown in FIG. 7 and sets the maximum value from the switching times of the transfer devices 303 constituting the switch destination communication path candidate. get. Then, the third acquisition unit 506 writes the acquired switching time in the switching destination channel candidate configuration information table 1000.

  The determination unit 507 selects the switching destination from the switching destination channel candidate group based on the expected influence level regarding the communication path and the expected influence level regarding each switching destination channel candidate acquired by the second acquisition unit 505. Determine the communication path. Specifically, for example, the determining unit 507 refers to the priority-specific switching rule table illustrated in FIG. 11, and predicts the degree of expected influence regarding the switching source communication path and the degree of expected influence regarding the communication path regarding the switching destination communication path candidate. Are used to determine a communication path as a switching destination from the switching destination communication path candidate group.

  FIG. 11 is an explanatory diagram of an example of the contents stored in the priority-specific switching rule table. The priority-specific switching rule table 1100 is stored in the memory 405 or the HDD 406 and has a priority-specific switching rule. Specifically, the priority-specific switching rule table 1100 includes an SLA class item 1101, an expected influence level item 1102 regarding a communication path, a switching rule item 1103, and a switch-back rule item 1104. The SLA class item 1101 is the same as that shown in FIG.

  In the expected influence level item 1102 regarding the communication path, a range of the expected influence level regarding the communication path regarding the communication path that is the switching source is defined. Assuming that the expected influence degree regarding the communication channel for the switching source communication channel is E, ranges of E ≧ 7, 7> E ≧ 5, 5> E ≧ 3, 3> E are defined as an example.

  A switching rule is stored in the switching rule item 1103. The switching regulation item 1103 is subdivided into an active system regulation item 1131 and a standby system regulation item 1132. The working system regulation item 1131 stores the working system regulation. The working system regulation is a range of the expected influence degree regarding the communication path required for the switching destination communication path when the switching source is the working communication path. For example, when the expected influence degree regarding the switching source communication path is E ≧ 7, the expected influence degree F regarding the communication path required for the switching destination communication path is F <3. Therefore, when the expected influence degree regarding the communication path of the switching source which is the active system is E ≧ 7 and the expected influence degree F regarding the communication path required for the switching destination communication path candidate is F <3, A certain switching source communication path is switched to a switching destination communication path candidate.

  In addition, in the working system regulations, a range of switching time is also defined as an example of resistance to an event. For example, when the expected influence level regarding the switching source communication path is E ≧ 7, the switching time T required for the switching destination communication path is T <5 seconds. Therefore, the expected influence degree regarding the switching source communication path which is the active system is E ≧ 7, the expected influence degree F regarding the communication path required for the switching destination communication path candidate is F <3, and the switching destination communication path candidate. When the switching time T is T <5 seconds, the switching source communication path that is the active system is switched to the switching destination communication path candidate.

  Further, the backup system definition item 1132 stores backup system specifications. Similarly to the active system rules, the standby system rules store the expected influence range and the switching time range for the communication path required for the switching destination communication path. As described above, after the notification of the event prediction information and before the occurrence of the event, it is possible to optimize the switching operation of the communication path by evaluating the validity of switching from the switching source communication path to the switching destination communication path. Can be achieved.

  Further, the switchback regulation item 1104 stores a switchback regulation. The switch-back regulation item 1104 is subdivided into an active system regulation item 1141 and a standby system regulation item 1142. The working system regulation item 1141 stores the working system regulation. The working system regulation is a switch-back condition in the switching destination communication path when the switching source is the working communication path. For example, when the elapsed time after the end time of the event is 10 minutes or longer, the switching is performed from the switching destination communication path that is the active system to the switching source communication path. In addition, the standby system definition item 1142 stores a backup system definition. Similarly to the working system regulations, the backup system regulations are switch-back conditions in the switching destination communication path when the switching source is the protection system communication path.

  In addition, the determination unit 507 determines, as a switching destination communication path, a switching destination communication path candidate whose expected influence degree related to the switching destination communication path candidate is lower than the expected influence degree related to the communication path from the switching destination communication path group. It is good. For example, when the expected influence degree regarding the switching source communication path is E ≧ 7, the expected influence degree F regarding the communication path required for the switching destination communication path may be F <7.

  In addition, the determination unit 507 switches from the switching destination communication path group that is equal to or less than a threshold corresponding to the event and has a lower expected impact level regarding the switching destination communication path candidate than an expected impact level regarding the communication path. The destination channel candidate may be determined as the switching destination channel. For example, when the event is an earthquake, if the predicted seismic intensity 4 is a threshold value corresponding to the event, as described above, the expected influence degree F related to the communication path required for the switching destination communication path is set to F <3. do it.

  Returning to FIG. 5, the control unit 508 controls switching from the communication path to the switching destination communication path determined by the determination unit 507. Specifically, for example, the control unit 508 generates a switching request message and transmits the switching request message to the switching control device 322.

  FIG. 12 is an explanatory diagram of a data structure example of the switching request message. The switching request message 1200 includes a communication channel ID item 1201, a communication channel classification item 1202, and a switching destination item 1203. Since the communication channel ID item 1201 and the communication channel classification item 1202 have the same contents as those in FIGS. In the switching destination item 1203, the node ID of the transfer device 303 through which the switching destination communication path passes is written.

  The control unit 508 extracts the communication path ID, the communication path classification, and the node ID of the transfer device 303 through which the switching destination communication path passes from the switching destination communication path candidate configuration information table 1000 illustrated in FIG. 1200 is generated and transmitted to the switching control device 322. When the switching is completed, the control unit 508 adds a record for the switching destination communication path to the communication path configuration information table 800.

  FIG. 13 is an explanatory diagram showing an example of the contents stored in the communication path configuration information table 800 after completion of the switching operation. In FIG. 13, the record of the communication path P3 passing through the transfer device 105 with the node ID: 005 as the switching destination communication path of the active communication path P1, and the node ID as the switching destination communication path of the standby communication path P2. : 006, the record of the communication path P4 passing through the transfer device 106 is added. The switching time is written in the record of the communication path P3 and the record of the communication path P4.

<Monitoring control processing procedure>
Next, an example of a monitoring control processing procedure executed by the monitoring control device 321 will be described.

  FIG. 14 is a flowchart illustrating an example of a monitoring control processing procedure executed by the monitoring control apparatus 321. First, the monitoring control device 321 waits for prediction information such as the emergency early warning message 600 by the reception unit 501 (S1401: No). When the prediction information is received (S1401: Yes), the monitoring control device 321 writes the information included in the prediction information in the transfer device table 700 (S1402), and the setting unit 502 stores the information in the communication path configuration information table 800. Writing is performed (S1403).

  Next, the monitoring control apparatus 321 uses the first acquisition unit 503 to execute a predicted influence degree determination process regarding the communication path (S1404). Although details of the predicted influence degree determination process (S1404) regarding the communication path will be described later, the monitoring control device 321 determines the expected influence degree regarding the communication path for each communication path by the expected influence degree determination process (S1404) regarding the communication path. You will learn.

  After the expected influence degree determination process (S1404) regarding the communication path, the monitoring control device 321 specifies the first end point and the second end point of the communication path to be switched by the specifying unit 504 (S1405). Next, the monitoring control device 321 searches for a switching destination channel candidate using the identified first endpoint and second endpoint (S1406). Then, the monitoring control device 321 writes the information of the switching destination channel candidate in the switching destination channel candidate configuration information table 1000 (S1407).

  Then, the monitoring control device 321 refers to the switching destination channel candidate configuration information table 1000 and executes a predicted influence degree determination process related to the communication path for the switching destination channel candidate (S1408). Although the details of the predicted influence level determination process (S1408) regarding the communication path will be described later, the monitoring control apparatus 321 performs the predicted influence level determination process (S1408) regarding the communication path by the second acquisition unit 505, so Each time, the expected influence on the communication path is learned.

  Thereafter, the monitoring control device 321 acquires resistance against the event by the third acquisition unit 506 (S1409). Then, the monitoring control device 321 sorts the switching destination channel candidate configuration information table 1000 in ascending order with the first priority of the expected influence degree regarding the communication channel and the second tolerance as the resistance to the event (S1410). Next, the monitoring controller 321 causes the determination unit 507 to execute switching / switchback rule extraction processing (S1411). Although details of the switching / switching-back rule extraction process (S1411) will be described later, in the switching / switching-back rule extraction process (S1411), the monitoring control device 321 displays the switching rule and the switching-back rule in the switching rule table by priority. Extract from 1100.

  Then, the monitoring control device 321 uses the determination unit 507 to execute a switching destination determination process (S1412). The details of the switching destination determination process (S1412) will be described later. In the switching destination determination process (S1412), a switching destination communication path is determined from the switching destination communication path candidate group. Thereby, the processing up to the determination of the switching destination communication path is completed.

<Expected impact determination processing for communication path>
FIG. 15 is a flowchart illustrating a detailed processing procedure example of the expected influence degree determination processing (S1402, S1408) regarding the communication path illustrated in FIG. Note that the monitoring control device 321 refers to the communication path configuration information table 800 in FIG. 8 in S1402, and refers to the switching destination channel candidate configuration information table 1000 in FIG. 10 in S1408. First, the monitoring control device 321 determines whether there is an unselected communication path (S1501). If there is an unselected communication path (S1501: Yes), one unselected communication path is selected (S1502). The selected communication channel is referred to as “selected communication channel”.

  The monitoring control device 321 initializes the prediction information of the selected communication path (S1503), and determines whether there is an unselected transit device in the selected communication path (S1504). When there is an unselected transit device (S1504: Yes), the monitoring control device 321 selects one unselected transit device (S1505). The selected transit device is referred to as “selected transit device”.

  Next, the monitoring control device 321 extracts the prediction information about the selected via device from the transfer device 303 table (S1506). Then, the expected impact level L of the event of the selected via device is compared with the expected impact level E regarding the communication path (S1507). In the case of the first selection transit device, E = 0 since it is immediately after the initialization in S1503. When L> E is satisfied (S1507: Yes), the prediction information of the selected communication path is updated with the prediction information of the selection passing device (S1508). Then, the process returns to S150. On the other hand, if L> E is not satisfied in S1507 (S1507: No), the process returns to S1504.

  In S1504, when there is no unselected transit device (S1504: No), the process returns to S1501. In S1501, when there is no unselected communication path (S1501: No), the expected influence degree determination process regarding the communication path is terminated, and the process proceeds to S1403 and S1409. As a result, the maximum expected impact level of the event finally becomes the expected impact level for the selected communication path.

<Switching / switchback rule extraction processing>
FIG. 16 is a flowchart showing a detailed processing procedure example of the switching / switching back rule extraction processing (S1411) shown in FIG. Here, it is assumed that the switching priority m is from A to Z. A is the switching priority with the highest priority.

  The monitoring control device 321 refers to the communication path configuration information table 800 in FIG. 8 and determines whether there is an unselected communication path (S1601). When there is an unselected communication path (S1601: Yes), the monitoring control device 321 selects one communication path (S1602). The selected communication channel is referred to as “selected communication channel”.

  Next, the monitoring control device 321 refers to the communication path configuration information table 800 and detects the switching priority of the selected communication path (S1603). Then, the monitoring control device 321 refers to the communication path configuration information table 800 and detects the expected influence level regarding the selected communication path (S1604). Thereafter, the monitoring control device 321 refers to the priority-specific switching rule table 1100, and extracts the switching rule and the switch-back rule according to the switching priority and the expected influence level regarding the selected communication path (S1605). Then, returning to S1601, the monitoring control device 321 determines whether there is an unselected communication path (S1601). If there is no unselected communication path (S1601: No), the switch / switchback rule extraction process (S1411) is terminated. Thereby, a switching rule and a switchback rule can be specified for each communication path.

<Switch destination decision processing>
FIG. 17 is a flowchart illustrating a detailed processing procedure example of the switching destination determination processing (S1412) illustrated in FIG. First, the monitoring control device 321 determines whether there is an unselected communication path (S1701). When there is an unselected communication path (S1701: Yes), the monitoring control device 321 selects one unselected communication path (S1702). The selected communication channel is referred to as “selected communication channel”. Then, the monitoring control device 321 specifies the total number M of switching destination channel candidates for the selected channel (S1703), and sets the variable j to j = 0 (S1704). The monitoring control device 321 increments j (S1705). Since the switching destination channel candidate group for the selected channel is sorted in S1410, j = 1st switching destination channel candidate C1 is the switching destination channel candidate that should be given the highest priority.

  Thereafter, the monitoring control device 321 determines whether or not M> j (S1706). When M> j is not satisfied (S1706: No), the monitoring control device 321 determines whether or not the switching destination channel candidate Cj satisfies the switching rule extracted for the selected channel in S1411 (S1707). If satisfied (S1707: Yes), the monitoring control device 321 determines whether or not the switching destination channel candidate Cj is conducted by transmitting a test packet or the like (S1708). When conducting (S1708: Yes). The monitoring control device 321 determines the switching destination communication path candidate Cj as the switching destination communication path of the selected communication path (S1709), and returns to S1701.

  If the switching rule is not satisfied in S1707 (S1707: No), the process returns to S1705, and the monitoring apparatus increments j. Similarly, also in S1708, when not conducting (S1708: No), the process returns to S1705, and the monitoring device increments j. In S1706, when M> j (S1706: Yes), the monitoring control device 321 determines the switching destination communication path candidate C1 as the switching destination communication path of the selected communication path (S1710), and returns to S1701. . As described above, when there is no switching destination channel candidate corresponding to the switching rule, the switching destination channel candidate C1 having the highest priority is adopted. In S1701, when there is no unselected communication path (S1701: No), the switching destination determination process (S1412) by the determination unit 507 ends.

<Switching control sequence>
FIG. 18 is a sequence diagram illustrating an example of a communication path switching control sequence in the network system 300. First, after the switching destination determination process (S1412) shown in FIG. 17, the monitoring control device 321 generates a switching request message 1200 by the control unit 508, and transmits it to the switching control device 322 (S1801).

  Upon receiving the switching request message 1200, the switching control device 322 generates a switching message according to the content of the switching request message 1200 and transmits the switching message to the transfer device 303 to be switched (S1802). Upon receiving the switching message, the transfer device 303 to be switched releases the setting of the switching source communication path and configures the switching destination communication path when the switching source communication path is configured by the existing technology. In such a case, the switching destination communication path is set (S1803). Then, the transfer device 303 to be switched transmits a switching response to the switching control device 322 (S1804).

  When the switching control device 322 receives a switching response from the transfer device 303 to be switched, the switching control device 322 transmits a switching request response to the monitoring control device 321 (S1805). The switching request response is a response message indicating whether the switching to the switching destination communication path has succeeded or failed. When the monitoring control device 321 receives the switching request response from the switching control device 322, as shown in FIG. 13, the monitoring control device 321 adds information about the switching destination communication path to the communication path configuration information table 800 and updates the switching time. (S1806). Thereby, the communication path switching process is completed.

<Switchback processing procedure>
Next, a description will be given of a switchback processing procedure for switching back from the switching destination communication path to the switching source communication path. The switch back process is executed by the monitoring control device 321 in accordance with the switch back rule extracted by the switching / switch back rule extracting process (S1411) of FIG.

  FIG. 19 is a flowchart illustrating an example of a communication path switchback processing procedure. First, the supervisory control device 321 specifies the elapsed time after the end time according to the switchback rule extracted by the switching / switchback rule extraction process (S1411) of FIG. 16 (S1901). Next, the monitoring controller 321 sets the timer value t to t = end time + elapsed time after the end time (S1903).

  Then, the monitoring control device 321 waits until time T (S1903: No). When the time t is reached (S1903: Yes), the monitoring control device 321 determines whether or not the switching source communication path is conductive (S1904). When it is not conductive (S1904: No), the switch-back process is completed because the switch-back cannot be performed.

  On the other hand, when it is conducting (S1904: Yes), the monitoring control device 321 generates a switching request message 1200 to the switching source communication path (S1905) and transmits it to the switching control device 322 (S1906). Thereafter, the switching destination communication path is switched back to the switching source communication path by the same processing as the sequence shown in FIG.

  As described above, according to the embodiment of the present invention, even when an uncertain or fixed failure is expected to occur in the communication path, the expected impact of the event and the SLA regarding the switching operation are evaluated. The switching operation can be realized. Therefore, the deviation of the SLA due to the switching of the communication path when an event such as an earthquake does not occur can be suppressed. Further, when an event occurs, the communication path is switched after the SLA is evaluated, so that communication disconnection due to a failure can be suppressed in advance.

  In addition, by setting the expected impact on the switching source communication path to the maximum value of the expected impact on the relay device in the communication path, evaluation is made based on the transfer device that is most susceptible to the event. Can be done. Not only the maximum expected impact of events, but also statistical values such as the average and median expected impact of relay devices in a communication channel are used to determine the expected impact of communication channels. You may get it.

  It is also possible to obtain the expected impact level on the communication path after weighting the impact level of the relay device according to the importance of the location of the relay device and the occurrence frequency of events in the past at the location. Good. Thereby, the expected influence degree of the event unique to the installation location of the transfer apparatus can be reflected in the expected influence degree regarding the communication path.

  In addition, by identifying the switching destination channel candidate group that is a channel whose expected impact level of the event is lower than the expected level of impact on the switching source channel, it is possible to predict an event that exceeds the expected impact level regarding the switching source channel The communication path including the influence degree can be excluded from the switching destination communication path candidates. Therefore, the efficiency of the switching control can be improved.

  In addition, by selecting a switching destination channel candidate having a lower expected impact level for the switching destination channel path than the expected impact level for the switching source channel from the switching destination channel group, When an event according to the expected influence degree regarding the road occurs, it is possible to switch to the switching destination communication path with lower influence. Therefore, it is possible to switch to a safe communication path according to the event that occurs.

  Further, in determining the switching destination communication path, the expected influence degree related to the switching destination communication path candidate is lower than the threshold corresponding to the event from the switching destination communication path group, and the switching source communication path is related. A switching destination channel candidate lower than the expected influence level may be determined as the switching destination channel. As a result, when an event corresponding to the expected influence level related to the communication path occurs, it is possible to switch to the communication path of the switching destination having a lower influence according to the feature of the event.

  Moreover, it is good also as acquiring the value which shows the tolerance with respect to the event regarding a switching destination channel candidate based on the value which shows the tolerance with respect to the event about the transfer apparatus group which comprises a switching destination channel candidate. In this case, in the switching destination channel candidate group, the switching destination communication channel candidate in which the value indicating the resistance to the event related to the switching destination channel is a value corresponding to the expected influence degree regarding the switching source channel is determined as the switching destination communication. It will be decided on the road.

  Therefore, for example, assuming that the resistance to an event is a switching time, the switching destination communication path candidate is determined as the switching destination when the switching time is in accordance with the expected influence level regarding the switching source communication path. As described above, since the switching destination communication path candidate that satisfies the conditions as the communication path is determined as the switching destination, switching considering the SLA can be realized.

  As described above, according to the present embodiment, the communication path switching operation can be appropriately performed by evaluating the influence of the occurrence of the event between the notification of the event occurrence forecast and the occurrence of the event. Can do.

  Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such specific configurations, and various modifications and equivalents within the spirit of the appended claims Includes configuration.

300 network system 301 notification system 302 monitoring control system 303 transfer device 321 monitoring control device 322 switching control device 501 reception unit 502 setting unit 503 acquisition unit 504 identification unit 505 acquisition unit 506 acquisition unit 507 determination unit 508 control unit

Claims (7)

A reception unit that accepts prediction information including the expected impact level of the event and the expected occurrence area;
For a transfer device in the prediction occurrence area included in the prediction information received by the receiving unit in a group of transfer devices that perform data transfer, a setting unit that sets the expected impact of the event in a storage device;
A first acquisition unit that acquires, based on the expected influence degree of the event set by the setting unit, an expected influence degree related to a communication path that uses a transfer device in the expected occurrence area in the transfer device group as a relay point When,
Based on the expected influence degree related to the communication path acquired by the first acquisition unit, a switching destination communication path candidate group in which transfer apparatuses at both ends are communication paths common to the communication path from among the transfer apparatus groups. A specific part for identifying
A second acquisition unit that acquires an expected influence level of each switching destination channel candidate of the switching destination channel candidate group specified by the specifying unit based on the expected influence level of the event;
Based on the expected influence degree related to the communication path and the expected influence degree related to each of the switching destination communication path candidates acquired by the second acquisition unit, the switching destination communication path is selected from the switching destination communication path candidate group. A determination unit for determining
A control unit that controls switching from the communication path to the switching destination communication path determined by the determination unit;
A monitoring control apparatus comprising: The first acquisition unit includes:
Obtaining the expected impact level of the event that is equal to or greater than a specified value among the expected impact levels of the event on the transfer device in the predicted occurrence area in the communication path as the expected impact level regarding the communication path The monitoring control apparatus according to claim 1. The specific part is:
Based on the expected influence degree related to the communication path, the transfer apparatuses at both ends are common to the communication path from the group of transfer apparatuses, and the expected influence degree of the event is higher than the expected influence degree related to the communication path. The monitoring control apparatus according to claim 1 or 2, wherein a switching destination channel candidate group that passes through a low transfer apparatus is specified. The determination unit
From the switching destination communication path group, a switching destination communication path candidate whose expected influence degree related to the switching destination communication path candidate is lower than an expected influence degree related to the communication path is determined as the switching destination communication path, The monitoring control apparatus according to claim 1 or 2. When a value indicating resistance to the event for the transfer device group constituting the switching destination communication path candidate is stored in the storage device, the switching destination communication path is based on the value indicating resistance to the event. A third acquisition unit that acquires a value indicating resistance to the event related to the candidate;
The determination unit
In the switching destination channel candidate group, a value indicating resistance to the event related to the switching destination channel candidate acquired by the third acquisition unit is a value corresponding to an expected influence level related to the communication channel. The monitoring control apparatus according to claim 1, wherein a switching destination communication path candidate is determined as the switching destination communication path. Acceptance procedure for accepting forecast information including expected impact level of event and expected occurrence area,
A setting procedure for setting the expected impact of the event in the storage device for the transfer device in the prediction occurrence area included in the prediction information received by the reception procedure in the transfer device group performing data transfer; ,
A first acquisition procedure for acquiring, based on the expected influence degree of the event, an expected influence degree regarding a communication path that uses the transfer apparatus in the expected occurrence area in the transfer apparatus group as a relay point;
Based on the expected influence degree related to the communication path acquired by the first acquisition procedure, among the transfer apparatus group, a switching destination communication path candidate group in which transfer apparatuses at both ends are communication paths common to the communication path Specific steps to identify
A second acquisition procedure for acquiring an expected influence level regarding each switching destination channel candidate of the switching destination channel candidate group specified by the specifying procedure based on the expected influence level of the event;
Based on the expected influence degree related to the communication path and the expected influence degree related to each of the switching destination communication path candidates acquired by the second acquisition procedure, the switching destination communication path is selected from the switching destination communication path candidate group. A decision procedure to determine,
A control procedure for controlling switching from the communication path to the switching destination communication path determined by the determination procedure;
A monitoring control method characterized in that a computer executes. Acceptance procedure for accepting forecast information including expected impact level of event and expected occurrence area,
A setting procedure for setting the expected impact of the event in the storage device for the transfer device in the prediction occurrence area included in the prediction information received by the reception procedure in the transfer device group performing data transfer; ,
A first acquisition procedure for acquiring, based on the expected influence degree of the event, an expected influence degree regarding a communication path that uses the transfer apparatus in the expected occurrence area in the transfer apparatus group as a relay point;
Based on the expected influence degree related to the communication path acquired by the first acquisition procedure, among the transfer apparatus group, a switching destination communication path candidate group in which transfer apparatuses at both ends are communication paths common to the communication path Specific steps to identify
A second acquisition procedure for acquiring an expected influence level regarding each switching destination channel candidate of the switching destination channel candidate group specified by the specifying procedure based on the expected influence level of the event;
Based on the expected influence degree related to the communication path and the expected influence degree related to each of the switching destination communication path candidates acquired by the second acquisition procedure, the switching destination communication path is selected from the switching destination communication path candidate group. A decision procedure to determine,
A control procedure for controlling switching from the communication path to the switching destination communication path determined by the determination procedure;
Monitoring control program for causing a computer to execute.

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